Blue triphenylmethane dyestuff.



era-Tics PATENT OFFICE.

aveus'r srocx AND rmupition 11mm, or nocnsr-on-rnn-iuam, ennMaiw,'-asstances: 'ro raanwnaxsr VORM. MEISTER LUCIUS & Batfumc, or Hocnsr-oirrnn-manr, GERMANY, A CORPORATION or GERMANY.

BLUE rmPHnNYLMnrnAN-n nYns'rU'rF.

' No Drawing.

provements in New Violet to Blue D estuffs.

of the 'jTripheny-linethane Series an Proc esses of Making the Same,-of which the following is a specification.

there are produced dyestufi's capable of being subsequentlychromed, which are however of little interest on accountof the fact that they are not fast alkali's. Now we have found,"that by heating these dyestuffs with-aromatic bases, they areti ansformed 20;

into other coloringmatter's which are of great value owing .to their pure tint and their alread' at'the temperature of the waterbath; y adding a salt of the base itcan be accelerated, but this is unnecessary. The reaction may also be effected in presence of a sol-vent, such as acetic acid of 90% strength.

-.Example: One part by weight, of the colori'ng matter obtained from p-chlorobenzal teration of the color is perceptible, themeltthe remaining solution the coloring mat recipitated by means of a mineral ed mass is rendered alkaline by means'of carbonate of sodaand the excess of the base is blown off by means of water-vapor. From ter is." acid, ltered and washed. When dry, it forms a dark powder of metallic Luster soluble in a srlution of sodium carbonate or sodium acetate with a violet-red color,-sol- .uble with a violet color in water, ethyland methyl-alcoholgsoluble in concentrated sul- By condensing the p-chloroben'zaldehyde with ortho-oXy-aryl-carboxylic acids and ox great fastness to alkalis and milling;-

The reaction with the'aromatic bases occurs "and ortho-cresotinic acid, which dyestu after being dried and pulverized, in the Specification of Letters Patent. Patentd June 20,- 1911. Application filed May 23, 1910. Serial No. 562,977.

furic acid with a reddish yellow color, insoluble in benzene, ether and chloroform, its aqueous solution turning bluish-red on, addition of caustic soda lye, and dyeing wool in an acid bath violetray tints which on being ti'eated'with a bichromate and acid, turn into bright violet-blue. tints of great fastness to milling. The dyein which can be subsequentl chromed, are o f a very pure violet tint, an i of excellent fastness to alka lis and milling. i v Having now particularly described our in vention what We claim is:

'1. The process of manufacturing violet to blue dyestuffs of the triphenylmethane series capable of being subsequently chromed,

which consists in heating with aromaticba'ses the coloring mattersobtained by oxidizing the condensation product of p-chloro sis able by heating with aromatic basesthe coloring matters produced fromp-chlorobenzaL dehyde and ortho-oxy-aryl-carboxylicacids, which dyestufis are, after being dried and pulverized, in the form of their sodium and ammbnium-salts, dark powders of a metallic luster, being soluble" with a violet color ink ble in concentrated su'lfuricac id with a red-.

. dish-yellow color, insoluble in benzene, ether and chloroform, their aqueous solution turn-u water, ethyland methyl-alcohol, also solu- 3; As anew productethe dyestufi obtainable heating with pitoluidin' the coloring matter produced from p-chlorobenzaldehvde is,

form of its sodium and ammonium-salt, a dark powder of a metallic luster, being soluble with a violetooloi' 1n wart, ethyland methyl-alcohol, also soluble in concentrated sulfuric acid with a; reddish yellow color,

insoloble in Benzehe, ether and chlorofor m, its aqueous solution turning bluish-red on .additlon of caustic soda 1 e;,dyeing wool in an acid bath violet-gray tmts which on being treated with a bichromate and acid, turn into bright violet-blue tints'of great fast-ness to milling.

In testimony "whereof, we aflix our signatures in presence of two witnesses 1 AUGUST STOCK.

FRIEDRICH HEIM. Witnesses: Y JEAN GRUND, CARL GRUND. 

